Acer X193 X183H / X193HQ Service Guide - Page 25

24 ACER X193HQ Go to cover page 5.5 Abnormal screen (For the DVI) 5. Troubleshooting (continued) Check the DVI video signal from computer input on P303 of DVI-I video connector. NG OK Failure Point 1) No DVI video signals output from host computer, check computer. 2) DVI Video signal cable disconnection. Check the DVI input video signals on I305 pin 2,3,4,5,6,7,47,48 respectively that differential input voltage is 150 to 1200mV, and input commond mode voltage is 3.3V. NG OK Failure Point In the case of the DVI_RX0+/- signal. (A DVI_RX1+/-, DVI_RX2+/- and DVI_RXC+/signal is the same path, too.) 1)Printed wire broke between P303 pin 17, 18 and I305 pin 4. 15. 2) Video cable is failure. 3) R334, R335 open. Check all LVDS signals being output to P305 from I305? NG OK Failure Point Printed wire broke between I305 and P305. Prpcess "Checking the resolution change IC movement" section.